CN114352334A - Coal leakage prevention hydraulic support for caving coal - Google Patents
Coal leakage prevention hydraulic support for caving coal Download PDFInfo
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- CN114352334A CN114352334A CN202111407512.6A CN202111407512A CN114352334A CN 114352334 A CN114352334 A CN 114352334A CN 202111407512 A CN202111407512 A CN 202111407512A CN 114352334 A CN114352334 A CN 114352334A
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- plate
- coal
- baffle
- tail beam
- hydraulic
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- 239000003245 coal Substances 0.000 title claims abstract description 63
- 230000002265 prevention Effects 0.000 title abstract description 13
- 238000003780 insertion Methods 0.000 claims abstract description 9
- 230000037431 insertion Effects 0.000 claims abstract description 9
- 239000010720 hydraulic oil Substances 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 3
- 238000007667 floating Methods 0.000 abstract description 3
- 238000007790 scraping Methods 0.000 abstract description 3
- 238000005065 mining Methods 0.000 description 4
- 239000003921 oil Substances 0.000 description 3
- 210000005056 cell body Anatomy 0.000 description 2
- 238000005422 blasting Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The invention discloses a coal leakage prevention hydraulic support for caving coal, which comprises: the hydraulic support comprises a hydraulic support body and a tail beam; the tail beam comprises a back support plate and side protection plates, wherein the inner sides of the side protection plates on the two sides are respectively fixed with a support baffle, a telescopic insertion plate is arranged in the tail beam, and the side protection plates and the support baffle form a track for the insertion plate to move; rectangular groove bodies are arranged on two sides of the inserting plate, springs are arranged at the bottoms of the groove bodies, and pop-up baffles are arranged in the groove bodies in a matched mode; the width of the upper part of the baffle positioned on one side of the track is smaller than that of the lower part, an arc-shaped step is formed between the upper part and the lower part, and after the baffle is popped out, the maximum distance between the end parts of the baffles on the two sides below the arc-shaped step is not smaller than the width of the tail beam; the bottom of the side guard plate is in contact fit with the arc-shaped step, so that the baffle plate is pressed into the groove body when the inserting plate is retracted into the tail beam. The invention effectively solves the problems that loose coal is scattered and leaked to the lower part through the gaps between the inserting plates, and the rear scraping plate is prevented from moving forwards or even floating upwards, and has stable and reliable structure and difficult damage.
Description
Technical Field
The invention relates to the field of hydraulic supports for coal mines, in particular to a coal leakage prevention hydraulic support for caving coal.
Background
The top coal caving mining method is characterized in that when a thick coal seam is mined, a coal mining working face with the mining height of 2-3 m is arranged along the bottom plate of the coal seam or the bottom of the coal seam within a certain thickness range, mining is carried out in a comprehensive mechanical mode, top coal is broken into discrete bodies under the action of mine pressure or by means of loosening blasting and the like, the top coal is discharged from a coal discharging window behind or above a support, and the top coal is conveyed out of the working face by a scraper conveyor.
Caving coal hydraulic support is mostly the trapezoidal picture peg at the picture peg that stretches out by the tail-boom at the during operation, and adjacent caving coal hydraulic support picture peg is when opening, can't form a confined space in the rear portion to make the loose coal body of caving coal hydraulic support top spill in the gap between adjacent picture peg and leak, lead to back scraper conveyor the place ahead float coal to pile up too much, thereby influence the removal of back scraper blade, slow down the production operation progress. Moreover, when too much float coal is accumulated in front of the rear scraper conveyor, the rear scraper conveyor moves forward and is supported by the float coal and gradually floats upwards, so that the conveying progress is seriously influenced. Even if the plugboard adopts a non-ladder plugboard, the plugboard is necessarily smaller than the tail beam in size because the plugboard needs to be retracted into the tail beam in a non-use state; when the flashboards of the adjacent caving coal hydraulic supports are opened, the flashboards cannot be attached to each other, and gaps between the flashboards cannot be closed, so that the problems still exist.
Disclosure of Invention
The invention aims to provide a coal leakage prevention hydraulic support for caving top coal, which solves the problem that the coal leakage at the rear of the hydraulic support for caving top coal affects the forward movement of a rear scraper plate by arranging a baffle plate in a plugboard.
In order to achieve the purpose, the invention adopts a coal leakage prevention hydraulic support for caving coal, which comprises: the hydraulic support comprises a hydraulic support body and a tail beam, wherein the tail beam is movably fixed at the rear part of the hydraulic support body;
the tail beam comprises a back supporting plate and side protecting plates, supporting baffles are fixed on the inner sides of the side protecting plates on the two sides, a telescopic inserting plate is installed in the tail beam, and the side protecting plates and the supporting baffles form a track for the inserting plate to move;
rectangular groove bodies are arranged on two sides of the inserting plate, springs are arranged at the bottoms of the groove bodies, and pop-up baffles are arranged in the groove bodies in a matched mode; the width of the upper part of the baffle positioned on one side of the track is smaller than that of the lower part, an arc-shaped step is formed between the upper part and the lower part, and after the baffle is popped out, the maximum distance between the end parts of the baffles on the two sides below the arc-shaped step is not smaller than the width of the tail beam; the bottom of the side guard plate is in contact fit with the arc-shaped step, so that the baffle plate is pressed into the groove body when the inserting plate retracts into the tail beam.
Furthermore, the bottom of the groove body is provided with a cylindrical guide rail, the spring is sleeved on the cylindrical guide rail, and the bottom of the baffle is provided with a guide rail hole matched with the cylindrical guide rail.
Preferably, in each groove body, at least two cylindrical guide rails are arranged.
Preferably, a hydraulic oil cylinder is arranged at the inner top of the tail beam and used for controlling the inserting plate to extend or retract.
Further, a plurality of rolling bearings are mounted on the inner side of the side guard plate along the extending direction of the rail.
Preferably, the upper side guard plate and the lower side guard plate of the baffle are provided with raised strip rails, and groove rails matched with the strip rails are arranged inside the groove body.
According to the coal leakage prevention hydraulic support for caving coal, in an initial state, the insertion plate is located inside the tail beam, and the baffle plate of the insertion plate is compressed in the groove body in the insertion plate under the action of the side protection plate of the tail beam. When the operation, the tail boom stretches out the back, and the control hydro-cylinder is released the picture peg from the track, and after the lower part roll-off tail boom of baffle, the baffle pops out in the cell body under the spring action, and the upper portion of baffle still is in the track, is blocked by the side guard plate of tail boom, prevents that the baffle is whole to pop out the cell body. The baffles of the adjacent coal leakage prevention caving coal hydraulic supports are in mutual contact, a relatively closed space is formed after the original inserting plate is supplemented, and the problem that the upper coal leaks between the gaps of the two adjacent coal leakage prevention caving coal hydraulic supports is solved.
When the inserting plate is controlled by the hydraulic oil cylinder to retract into the tail beam, the lower end of the side protecting plate of the tail beam presses arc-shaped steps formed by the upper part and the lower part of the baffle plate, and the baffle plate is gradually pressed into the groove body, so that the initial state is recovered.
The invention effectively solves the problems that loose coal is scattered and leaked to the lower part through the gaps between the inserting plates, and the rear scraping plate is prevented from moving forwards and even floating upwards; and above-mentioned stable in structure is reliable, under complicated operating mode environment in the pit, and is not fragile.
Drawings
FIG. 1 is a schematic view of a coal leakage prevention hydraulic support for caving coal of the present invention;
FIG. 2 is a schematic view of the installation of a tail boom and a plugboard of the present invention;
FIG. 3 is a schematic view of the tail boom construction of the present invention;
FIG. 4 is a schematic view of the structure of the socket of the present invention;
FIG. 5 is a side view of the board of FIG. 4;
FIG. 6 is a schematic view of the baffle structure of the present invention;
in the figure: 1. a hydraulic bracket body;
2. a tail boom; 21. the back support plate, 22, the side guard plate, 23, the support baffle, 24, the hydraulic oil cylinder and 25, the rolling bearing;
3. inserting plate, 31 groove body, 32 column guide rail, 33 spring, 34 groove track;
4. baffle, 41 arc steps, 42 guide rail pore canals, 43 strip-shaped rails.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
The invention adopts a coal leakage prevention hydraulic prop for caving coal, as shown in figure 1, comprising: the hydraulic support comprises a hydraulic support body 1 and a tail beam 2 movably fixed at the rear part of the hydraulic support body 1;
as shown in fig. 2 and 3, the tail beam 2 includes a back support plate 21 and side guard plates 22, the inner sides of the side guard plates 22 at both sides are fixed with support baffle plates 23, the telescopic insertion plate 3 is installed inside the tail beam 2, and the side guard plates 22 and the support baffle plates 23 form a track for the insertion plate 3 to move; that is, the skirt boards 22, the support fence 23, and the back support board 21 form a slot-type rail in which the board 3 can move up and down.
As shown in fig. 4, 5 and 6, rectangular groove bodies 31 are arranged at two sides of the insert plate 3, a spring 33 is arranged at the bottom of the groove body 31, and a pop-up baffle 4 is arranged in the groove body 31 in a matching manner; the width of the upper part of the baffle 4 positioned on one side of the track is smaller than the width, an arc-shaped step 41 is formed in the transition area of the upper part and the lower part, and after the baffle 4 is popped up, the maximum distance between the end parts of the baffles 4 on the two sides below the arc-shaped step 41 is not smaller than the width of the tail beam 2; the bottom of the skirt panel 22 engages the arcuate step 41 to press the apron 4 into the channel 31 when the insert panel 3 is retracted inside the tail boom 2. Preferably, a hydraulic oil cylinder 24 is arranged at the inner top of the tail beam 2 and used for controlling the flashboard 3 to extend or retract. Other schemes, such as a cylinder, or a gear matched with a spur rack, can be adopted to control the inserting plate 3 to extend or retract.
In the initial state, the insert plate 3 is positioned inside the tail beam 2, and the baffle plate 4 is compressed in the groove body 31 in the insert plate 3 under the action of the side guard plate 22 of the tail beam 2. During operation, as shown in fig. 2, after the tail beam 2 extends out, the control oil cylinder pushes the inserting plate 3 out of the track, after the lower part of the baffle 4 slides out of the tail beam 2, the baffle 4 is popped out of the groove body 31 under the action of the spring 33, the upper part of the baffle 4 is still in the track and is clamped by the side guard plate 22 of the tail beam 2, and the baffle 4 is prevented from being popped out of the groove body 31 integrally. The baffles 4 of the adjacent coal leakage prevention caving coal hydraulic supports are in mutual contact, a relatively closed space is formed after the original inserting plate 3, and the problem that coal above leaks between the gaps of the two adjacent coal leakage prevention caving coal hydraulic supports is solved.
When the inserting plate 3 is controlled by the hydraulic oil cylinder 24 to retract into the tail beam 2, the lower end of the side protecting plate 22 of the tail beam 2 presses the arc-shaped step 41 formed by the upper part and the lower part of the baffle 4, and the baffle 4 is gradually pressed into the groove body 31, so that the initial state is recovered.
In the process, the baffle plates 4 extend out or retract from the groove body 31, electric power or oil pressure power is not needed, the structure is safe and reliable, the situation that electric or oil circuit faults are caused due to the fact that the baffle plates 4 continuously move and the power is too high when the baffle plates 4 are clamped into coal blocks or rocks between the adjacent baffle plates 4 is avoided.
In order to ensure that the baffle 4 moves more stably in the groove 31, as shown in fig. 4 and 5, a cylindrical guide rail 32 is arranged at the bottom of the groove 31, a spring 33 is sleeved on the cylindrical guide rail 32, and a guide rail hole 42 matched with the cylindrical guide rail 32 is arranged at the bottom of the baffle 4. The cylindrical guide rail 32 is matched with the guide rail hole 42, that is, the cylindrical guide rail 32 is always inserted into the guide rail hole 42, so that the moving track of the baffle 4 is further limited, and the baffle 4 can move stably and smoothly. Preferably, at least two cylindrical rails 32 are provided in each channel 31.
Further, a plurality of rolling bearings 25 are mounted inside the skirt 22 along the track extending direction; when the inserting plate moves up and down in the track, the baffle plate 4 is in contact with the bottom of the track, namely the side guard plate 22 of the tail beam 2, and is changed into direct contact with the rolling bearing 25, and the rolling bearing 25 rotates along with the up-and-down movement of the baffle plate 4; the operating pressure of hydraulic rams 24 may be relieved.
In order to further ensure the stability of the baffle 4 moving in the groove body 31, it is preferable that the upper and lower side guard plates 22 of the baffle 4 are provided with a raised strip-shaped rail 43, and the groove rail 34 matched with the strip-shaped rail 43 is arranged inside the groove body 31.
The invention effectively solves the problems that loose coal is scattered and leaked to the lower part through the gaps between the inserting plates 3, and the rear scraping plate is prevented from moving forwards and even floating upwards; and above-mentioned stable in structure is reliable, under complicated operating mode environment in the pit, and is not fragile.
Claims (6)
1. An anti-leakage hydraulic prop for caving coal, comprising: the hydraulic support comprises a hydraulic support body (1) and a tail beam (2) movably fixed at the rear part of the hydraulic support body (1); the method is characterized in that:
the tail beam (2) comprises a back support plate (21) and side protection plates (22), supporting baffles (23) are fixed on the inner sides of the side protection plates (22) on the two sides, a telescopic insertion plate (3) is installed in the tail beam (2), and the side protection plates (22) and the supporting baffles (23) form a track for the movement of the insertion plate (3);
rectangular groove bodies (31) are arranged on two sides of the inserting plate (3), springs (33) are installed at the bottoms of the groove bodies (31), and pop-up baffles (4) are installed in the groove bodies (31) in a matched mode; the width of the upper part of the baffle (4) positioned on one side of the track is smaller than that of the lower part, an arc-shaped step (41) is formed between the upper part and the lower part, and after the baffle (4) is popped up, the maximum distance between the end parts of the baffles (4) on the two sides below the arc-shaped step (41) is not smaller than the width of the tail beam (2); the bottom of the side guard plate (22) is in contact fit with the arc-shaped step (41) so that the baffle plate (4) is pressed into the groove body (31) when the inserting plate (3) retracts into the tail beam (2).
2. The hydraulic prop for preventing coal leakage and caving coal as claimed in claim 1, wherein: the bottom of the groove body (31) is provided with a cylindrical guide rail (32), the spring (33) is sleeved on the cylindrical guide rail (32), and the bottom of the baffle (4) is provided with a guide rail hole (42) matched with the cylindrical guide rail (32).
3. The hydraulic prop for preventing coal leakage and caving coal as claimed in claim 2, wherein: in each groove body (31), at least two cylindrical guide rails (32) are arranged.
4. The hydraulic prop for preventing coal leakage and caving coal as claimed in claim 1, wherein: and a hydraulic oil cylinder (24) is arranged at the inner top of the tail beam (2) and is used for controlling the inserting plate (3) to extend or retract.
5. The hydraulic prop for preventing coal leakage and caving coal of any one of claims 1 to 4, wherein: a plurality of rolling bearings (25) are mounted on the inner side of the side guard plate (22) along the extension direction of the rail.
6. The hydraulic prop for preventing coal leakage and caving coal of any one of claims 1 to 4, wherein: the upper side guard plate and the lower side guard plate (22) of the baffle plate (4) are provided with raised strip-shaped rails (43), and groove rails (34) matched with the strip-shaped rails (43) are arranged inside the groove body (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111407512.6A CN114352334A (en) | 2021-11-25 | 2021-11-25 | Coal leakage prevention hydraulic support for caving coal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111407512.6A CN114352334A (en) | 2021-11-25 | 2021-11-25 | Coal leakage prevention hydraulic support for caving coal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114352334A true CN114352334A (en) | 2022-04-15 |
Family
ID=81095479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111407512.6A Pending CN114352334A (en) | 2021-11-25 | 2021-11-25 | Coal leakage prevention hydraulic support for caving coal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114352334A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1438796A (en) * | 1972-06-14 | 1976-06-09 | Groetschel Karl Maria | Advancing mine support systems |
| CN101105135A (en) * | 2007-08-10 | 2008-01-16 | 郑州煤矿机械集团有限责任公司 | Two column protected type hydraulic prop frame for low position blasting down the roof coal |
| CN204253085U (en) * | 2014-10-16 | 2015-04-08 | 永城煤电控股集团有限公司 | There is the Telescopic beam of hydraulic bracket auxiliary shoring device of locking function |
| CN204283466U (en) * | 2014-11-24 | 2015-04-22 | 平煤神马机械装备集团河南矿机有限公司 | Be applicable to " three is soft " seam mining totally enclosed type caving roof coal hydraulic support |
| CN104747218A (en) * | 2015-03-02 | 2015-07-01 | 程龙斌 | Roof leakage and roof collapse preventing device of fully-mechanized coal mining hydraulic support |
| CN205918436U (en) * | 2016-08-10 | 2017-02-01 | 林州重机集团股份有限公司 | Flexible roof beam with two -way side -pushing device |
| CN113586106A (en) * | 2021-09-03 | 2021-11-02 | 安徽理工大学 | Non-frame spacing fully mechanized caving hydraulic support and method for preventing top leakage of inclined loose thick coal seam |
-
2021
- 2021-11-25 CN CN202111407512.6A patent/CN114352334A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1438796A (en) * | 1972-06-14 | 1976-06-09 | Groetschel Karl Maria | Advancing mine support systems |
| CN101105135A (en) * | 2007-08-10 | 2008-01-16 | 郑州煤矿机械集团有限责任公司 | Two column protected type hydraulic prop frame for low position blasting down the roof coal |
| CN204253085U (en) * | 2014-10-16 | 2015-04-08 | 永城煤电控股集团有限公司 | There is the Telescopic beam of hydraulic bracket auxiliary shoring device of locking function |
| CN204283466U (en) * | 2014-11-24 | 2015-04-22 | 平煤神马机械装备集团河南矿机有限公司 | Be applicable to " three is soft " seam mining totally enclosed type caving roof coal hydraulic support |
| CN104747218A (en) * | 2015-03-02 | 2015-07-01 | 程龙斌 | Roof leakage and roof collapse preventing device of fully-mechanized coal mining hydraulic support |
| CN205918436U (en) * | 2016-08-10 | 2017-02-01 | 林州重机集团股份有限公司 | Flexible roof beam with two -way side -pushing device |
| CN113586106A (en) * | 2021-09-03 | 2021-11-02 | 安徽理工大学 | Non-frame spacing fully mechanized caving hydraulic support and method for preventing top leakage of inclined loose thick coal seam |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Country or region after: China Address after: 467000 miner Middle Road No. 21, Henan Province, Pingdingshan Applicant after: China Pingmei Shenma Holding Group Co.,Ltd. Applicant after: CHINA University OF MINING AND TECHNOLOGY Applicant after: PINGDINGSHAN TIANAN COAL MINING Co.,Ltd. Address before: 467000 miner Middle Road No. 21, Henan Province, Pingdingshan Applicant before: CHINA PINGMEI SHENMA ENERGY CHEMICAL GROUP Co.,Ltd. Country or region before: China Applicant before: CHINA University OF MINING AND TECHNOLOGY Applicant before: PINGDINGSHAN TIANAN COAL MINING Co.,Ltd. |
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| CB02 | Change of applicant information |